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1995 Buick Riviera 3.8L Poor Idle Quality, MisfireVIN: 1G4GD22K3SVehicle came into the shop running very rough at idle. We
hooked up scan tool and found the the stft 182 counts and
ltft 149 counts with an o2 sensor reading of 13 MV. Idle
smooths when propane is added to air stream and fuel trims
come down with o2 reading in... Trouble codes: P0740, P0171, P0131

2000 Buick Regal LS 3.8L Trac ControlVIN: 2G4WB55KXYLooking for information on the Variable Effort Steering.
I'm getting a code c1241. I'm also getting a c1232 left
speed sensor open or shorted. When monitoring the left
sensor with a scan tool it shows as good. Also when cycling
the ignition key from off to on ...

2004 Chevrolet Malibu LS 3.5L RearVIN: 1G1ZT548X4This malibu has a rattle in the rear end going over small
or large bumps, you can hear it as slow as ten mph. It
sounds just like a sway bar link rattle. Its not a sway bar
we removed it noise is still there. All control arm and
trailing arm bushings are good....

2005 Chevrolet Trailblazer LS 4.2L MechanicalVIN: 1GNES16S45Customer brought this Trailblazer in for a noise. Put on
the rack and ticking noise sounded like coming from the
transmission pump area. Dropped pan and there was a lot of
metal shavings in the pan. Pulled transmission tore down
and found wear on the converter...

2007 Chevrolet Impala LS 3.5L No Start, died while drivingVIN: 2G1WB58N17this impala was towed in. died at cruise. cranks but no
start. runs on carb spray in booster nipple. have 55 psi
fuel pressure. have 12 volts to injectors on pink/black
wire. have no ground signal to any injectors from ecm.
tried new factory crank sensor made ...

2003 GMC Envoy XL SLT 5.3L EngineVIN: 1GKET16P43Hi everyone and thanks in advance for any help. A customer
brought me her recently purchased 2003 Envoy XL (5.3 L).
Her complaint was no heat. I immediately checked the
coolant level and found it to be 3 litres low on Dexcool.
As soon as I diagnosed this a lig...

2000 Pontiac Grand Am SE 2.4L Parking LightsVIN: 1G2NF52TXYNeed wiring diagram right side fuse block and or pin out
for parking light circuit for right side fuse block to
parking lights. And or help on where to look for short

2002 Pontiac Grand Prix GT 3.8L Hard startVIN: 1G2WP52K32Hi Guys, This car came for a hard start and a stalling
while stopped.No codes stored. Traced problem to no
injector pulse for about 3 seconds of cranking. Checked
grounds ( voltage drop),everything appears to be operating
normally. I have no scope at the momen...

1991 Buick Park Avenue 3.8L No crankVIN: 1G4CW53L1MThanks for everyone who took time to reply. The final fix was making a resistor of equal value to that in the key. A comedy of errors caused me to make a new resistor. First the origonal resistor I made did indeed break causing an open circuit and secondly spl...

2006 Buick Rendezvous CXL 3.5L 5 volt referenceVIN: 3G5DB03L26I found connector C305 outside under the drivers seat holding water/salt after it was unplugged, literally water came running out. I could not find any breaches in the seals though and there is two other connectors attatched to it that had no moisture intrusi... Trouble codes: P0641 (5 volt reference circuit 1).

1994 Chevrolet Cavalier RS 3.1L Poor Idle Quality, HesitationVIN: 1G1JC84T1RBefore reading any replies, we decided to try replacing the ignition module and coils on the engine since we keep good used spares on hand. This did nothing except waste a few hours time!
So on everyones advice, I popped the upper plenum TOTALLY off (as in of...

2000 Chevrolet Cavalier 2.2L UnknownVIN: 1G1JC5244YThe vehicle had a small transmission line leak. The fluid was low. I replaced the lines and topped off the fluid and all is well. Thank you all for your help. You guys are the greatest.

2004 Chevrolet Suburban 1500 LS 5.3L Rt Outside MirrorVIN: 3GNFK16Z84Talked to dealer and they said it had to be programmed but Mitchell and Alldata say no.Only if truck has camper mirrors. I disconnected battery for 10 min. and corrected problem. Thanks for all your help.

2005 Chevrolet Astro 4.3L Fuel & Batt gauges, warning lights, PRNDL VIN: 1GCDM19X45I called my customer to schedule another appointment to perform some of the tests recommended by other IATN members. He said that "the instrument panel was acting normal as of three days ago". The van belongs to an electrical contractor I work for a lot so t...

2006 Chevrolet Impala LTZ 3.9L HeatVIN: 2G1WU58116Thanks to all who replied, The coolant was low but much more than I first thought, when I first added it didn't take much, but after all the replies about how hard it is to get air out because heater hoses are higher than cap I decided to remove heater hoses a...

2007 GMC Acadia SLE 3.6L MIL Lamp onVIN: 1GKER137X7Oak guys thanks for all your help, the customer is short on many and she is not going to fix the vehicle at this time, but the funny part is when they say is to much many i am going to sell it, thanks everyone
Trouble codes: P0016 (Crankshaft Position CKP - Intake Camshaft Position CMP Correlation Bank 1).

2002 Saturn SL2 1.9L EngineVIN: 1G8ZK52732Hello every one, got to the bottom of this mess finally. I did check all the sensors that could cause the problem all had good reference voltage and good signal return. found bad connection at the eic module ground an the engine ground at the back of the engin...